djvu | 3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19

Analysis

max time kernel
147s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
22/05/2024, 12:52

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General

Target
3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
Size 710KB
Sample240522-p38e4scb21
SHA256 3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19
MD5 f47cff4805227d54842556b0bddaaf7e
SHA1 f734391825c9028127d49fd00dcfcc24aa801eaa
SHA512 369af8e8e589126accc108c5e86484ce71d57646b2a7ee436cc2a1a0d71ca57422681590300215b4606306d5f9df6e1264c7ec8d87da8ccf12f8054a67f8964b
SSDEEP 12288:BidJzy+JS1wz8BcokecNRgMjBoVvS27EjYkWTa5310Wh44Zh3Pfp6/yA2m:Bid1vJS1xcokeUsvS27wG4nfB6KA2m
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/33b490a613f49fa190924f199d2c079e20240512191214/caaf73 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0871PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral2/memory/2056-2-0x0000000004B40000-0x0000000004C5B000-memory.dmp	family_djvu
behavioral2/memory/4972-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4972-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2688-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2124	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1474490143-3221292397-4168103503-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\64bd9f41-c87d-49b3-ad36-947ab7b564a5\\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe\" --AutoStart"	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	api.2ip.ua
8	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2056 set thread context of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2384 set thread context of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
2688	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
2688	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 2056 wrote to memory of 4972	2056	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	78
PID 4972 wrote to memory of 2124	4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	80
PID 4972 wrote to memory of 2124	4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	80
PID 4972 wrote to memory of 2124	4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	80
PID 4972 wrote to memory of 2384	4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	81
PID 4972 wrote to memory of 2384	4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	81
PID 4972 wrote to memory of 2384	4972	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	81
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84
PID 2384 wrote to memory of 2688	2384	3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe	84

C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
"C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2056
- C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
  "C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4972
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\64bd9f41-c87d-49b3-ad36-947ab7b564a5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2124
- - C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
    "C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2384
  - - C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
      "C:\Users\Admin\AppData\Local\Temp\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 1KB
SHA256 e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
MD5 6728aea2631b86a76c237508d8ba9b55
SHA1 7a670f95cac088313f7558869162fe01c6dc0ec9
SHA512 533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 724B
SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
MD5 8202a1cd02e7d69597995cabbe881a12
SHA1 8858d9d934b7aa9330ee73de6c476acf19929ff6
SHA512 97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
MD5 SHA1 SHA512

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24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Size 410B
SHA256 703f84c609ff2f0f9412025ba286ec108aad3048801838d5fcc93240d91855b0
MD5 81da269685182ec315099e52a04e5191
SHA1 5cdac3a74f850e8fb7a978e1c44a892d9dc7f6a4
SHA512 2e3e5a15185942ace7819ce2785b23778eb6b5a0ccd9511deec46b95ec09e8fb6b800a74229e75d29ce94086a6a377b27002d06034965b007c262c75a703f42b
MD5 SHA1 SHA512

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CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Size 392B
SHA256 c61b6fb42325a0a551c4891a4ddd671aef06279e6efce7be2e413ba8309fa43b
MD5 7d295fa1e3fc8098b3a54410b95c1b08
SHA1 c44c3152a223930438e2ab1c80b762c383c52a98
SHA512 4b1ca6c4464e1fdadc3b97b06792ba04c468e70393c7b22f659d02c681f4343bb664ff64aa263ff82fac3d976f6414b1a9b66140db05c2fb92d1c6c65b0bb645
MD5 SHA1 SHA512

Submit Download

3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe

Path C:\Users\Admin\AppData\Local\64bd9f41-c87d-49b3-ad36-947ab7b564a5\3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19.exe
Size 710KB
SHA256 3a2093b715f42abed73e4fa37d3c58d1bb0cd6f4767ae096f43518e1b168cb19
MD5 f47cff4805227d54842556b0bddaaf7e
SHA1 f734391825c9028127d49fd00dcfcc24aa801eaa
SHA512 369af8e8e589126accc108c5e86484ce71d57646b2a7ee436cc2a1a0d71ca57422681590300215b4606306d5f9df6e1264c7ec8d87da8ccf12f8054a67f8964b
SSDEEP 12288:BidJzy+JS1wz8BcokecNRgMjBoVvS27EjYkWTa5310Wh44Zh3Pfp6/yA2m:Bid1vJS1xcokeUsvS27wG4nfB6KA2m
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2056-2-0x0000000004B40000-0x0000000004C5B000-memory.dmp

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memory/2056-1-0x0000000004AA0000-0x0000000004B3F000-memory.dmp

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memory/2688-29-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-33-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-37-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-35-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-34-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-22-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-27-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-28-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2688-31-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-4-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-6-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/4972-19-0x0000000000400000-0x0000000000537000-memory.dmp

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